My Gigabyte GTX480 started acting up, system freezes during boot, after boot, few min after boot, gpu led lights up sometimes. At first this was random and i thought it was a HD going bad, disconnected it and it was fine for a few days but now it came back and is happening all the time. I removed the card and cleaned it and it still persists, I replaced the card with another gpu and everything works perfect, I also swiched arround power cables to see if it was a power issue and it wasn't, tried different drivers with no avail. Temps on the "faulty gpu" are 40-60 when these lock ups occur so it cant be overheating.

Should I RMA it? or is there something i missed here?